Brandwave

Devan Tanks vs Promax:Which is more popular in New Zealand?

In October 2026, Promax had more branded searches than Devan Tanks among water tank brands in New Zealand. Promax had about 2,910 branded searches, while Devan Tanks had 2,400. Promax made up 30.7% of all water tank brand searches we track, and Devan Tanks accounted for 25.3%. When we asked ChatGPT and Google AI Overviews about water tank brands, Promax appeared in all five answers and Devan Tanks in three. Devan Tanks and Promax were each mentioned first in two of the four answers.

Among water tank brands in New Zealand in October 2026

Who do people search for more?

Promax, about 21% more searches than Devan Tanks

Promax 2.9K searchesDevan Tanks 2.4K searches

Who does AI mention more?

Promax, mentioned in every answer we collected

Promax in 5 of 5Devan Tanks in 3 of 5

Who does AI recommend more?

Each is named first in 2 of 4 answers.

Devan Tanks first in 2Promax first in 2

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Top water tank brands in ChatGPT and Google AI Overviews

In three ChatGPT questions and two Google AI Overviews, Promax appeared in all five answers. Devan Tanks was mentioned in three out of five: in all three ChatGPT answers, but not in either of the two Google AI Overviews. Devan Tanks and Promax were each listed first in two of the four answers.

Most recommended by AI

Brands get a higher ranking if they are mentioned earlier in the answers.

  1. Promax1st
  2. Devan Tanks2nd
  3. Bailey2nd
  4. Devon–
  5. Thin Tanks–
  6. Tankworks–
  7. Rhino Water Tanks–

Mentioned by AI

Each dot is one answer, filled in when that answer mentions the brand.

  • Promax5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
  • Bailey5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
  • Devan Tanks3 of 5Named in 3 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Thin Tanks1 of 5Named in 0 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Devon0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Tankworks0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Rhino Water Tanks0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers

See every answer about water tank brands

5 answers

Not named in any answer:

Brands are shown in the order each answer named them. The survey took place in New Zealand on October 21, 2026.

Is Devan Tanks or Promax more popular in search?

This chart shows how often people search Google for Devan Tanks and Promax by name. Each line represents a brand's share of searches for all seven water tank brands we track, month by month, from searches in New Zealand.

Devan Tanks and Promax among water tank brands in New Zealand, by month

Share of searches by month for Promax, Devan Tanks. The figures are in the table below the chart.

View monthly share of searches table
MonthPromaxDevonDevan TanksBaileyThin TanksTankworksRhino Water Tanks
Nov 202527.3%28.8%27.7%13.6%2.3%0.12%0.12%
Dec 202527.6%27.6%26.4%14.9%3.1%0.17%0.17%
Jan 202628.1%27.4%25.9%15.7%2.6%0.14%0.14%
Feb 202629.2%26.6%25.4%15.4%3.1%0.13%0.13%
Mar 202627.4%28.5%26.4%14.7%2.9%0.11%0%
Apr 202630%26.7%24.8%15%3.4%0.13%0%
May 202629.3%28.5%26%12.9%3.3%0.14%0%
Jun 202628.7%29.2%27.1%12.6%2.3%0.11%0%
Jul 202631.9%27.2%25.6%12.7%2.6%0%0.13%
Aug 202631%26.9%25.7%13.1%3.1%0.11%0.11%
Sep 202633%25.6%24.7%14%2.6%0%0.1%
Oct 202630.7%27.1%25.3%14.3%2.4%0.11%0%

How has branded search for Devan Tanks and Promax changed in New Zealand over the last 12 months?

3 findings
  • The lead changed hands once in the 12 months ending October 2026: Promax took it in December 2025.
  • Across the 12 months ending October 2026, Devan Tanks’ share of searches among water tank brands in New Zealand moved from 27.7% to 25.3%, and its estimated monthly branded searches held steady at 2.4K.
  • Across the 12 months ending October 2026, Promax’s share of searches among water tank brands in New Zealand moved from 27.3% to 30.7%, and its estimated monthly branded searches moved from 2.4K to 2.9K.

How did search popularity change for New Zealand water tank brands in October 2026?

2 changes

  1. In October 2026, Devan Tanks gained share of searches among water tank brands in New Zealand, from 24.7% to 25.3%.

  2. In October 2026, Promax lost share of searches among water tank brands in New Zealand, from 33% to 30.7%.

How are Devan Tanks’ and Promax’s branded searches counted?

8 search terms

Brandwave collects information about searches that people make online using Devan Tanks’ and Promax’s names. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brands is growing, holding steady, or fading.

Devan Tanks

1 branded search term

  • devan tanks

Promax

7 branded search terms

  • promax
  • promax diesel tanks
  • promax septic tanks
  • promax slimline tanks
  • promax tanks
  • promax underground tank
  • promax water tanks

How the Brand Demand Index is measured

Other head-to-heads among water tank brands

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